Walter s



(NoModeL) W. S. PHELPS.

mines 52221222502? flaw %m. M h 1M .flzzaz'zzeyx' UNITED STATES PATENTOFFICE.

IVALTER S. PHELPS, OF INDIANAPOLIS, INDIANA. I

COMPOUND FEED-MOTION FOR BORING CYLINDERS.

SPECIFICATION forming part of Letters Patent- No. 570,050, dated October2'7, 1896.

Application filed February 5,1896. Serial No. 578,121. (No model.)

To all whom it "may concern:

Be it known that I, WALTER S. PHELPS, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented certain new and useful Improvements in Compound Feed-M0-tions for Boring Cylinders; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form a part of thisspecification.

My invention relates to a device for actuating and reversing thefeed-screw of a boring-bar revolving on centers, which may be usedeither in connection with a lathe, or portably, wherever desired, tobore out the inside of cylinders or tubes with a continuous spiral orserpentine movement; and it consists of a suitable frame supporting andcarrying a series of gear-wheels controlled by a lever and novelactuating devices, as will be more fully described hereinafter.

The object of my invention is to provide a simple and inexpensivereversing motion, and I have constructed my apparatus of few parts, ofsimple design, and which is economical to manufacture and durable inuse.

Referring to the drawings, Figure 1 represents a portion of a boring-barand tool-head with my device attached. Fig. 2 is a front elevation, andFig. 3 a reverse elevation, of my device disconnected from the bar.

In the drawings, A represents a boring-bar having a slidable head B, ofany suitable size or design, carrying suitable boring-tools 11, securedin sockets by means of set-screws Z), the head being moved along the barin either direction by means of the feed-screw L, which is revoluble,lying in a groove in the side of the bar. The tool-head has a block Z,having a thread engaging in the threads of the screw L. The barissupported in alathe or block, when desired, by the centers R and E.

M is a socket secured in the groove of a bar bya screw-boltm. The end ofthe feed-screw L has a shank supported and revoluble in the socket. Thefeed-screw has keyed onto it or set-screwed a gear-wheel K, which mayrevolve in a recess cut into the side of the bar secured by usualdevices known in mechanics.

C represents a frame the lower part of which has the form of a ring Cwhich is made to fit over the end of the bar, and is secured thereto byset-screws 0. Near the upper portion of the frame 0 is a shaft N,fitting and revoluble in a hole through the frame,to which is keyed thegear-wheel I, and an intermediate gear-wheel J is supported by a studsecured to the frame 0. This intermediate gear engages with the gear Iand the gear K, transmitting motion to the feed-screw. A hub H issupported by the shaft N, and has an arm 11, having two or more studs atthe end of the arm, on which are gear-wheels G and O, revoluble on thestuds. To the shaft N is keyed a larger gear-wheel F, which meshes andengages with the larger gear-wheel O. A lever P extends outward from thearm H and is preferably made an integral part thereof.

The frame 0 has the end 0 having the slot h through which the screw-bolth may slide. The hub H has a short arm H having a hole through which thebolt h is inserted. The hub 11 being revoluble upon the shaft N, the twoadjacent faces of the parts 0 and H are slidable and are secured frommovement after being adjusted by means of a thumb-nut h. Attached to theshaft N is a crank N, having a handle for rotating the shaft when thrownout of gear, by which the tool-head is moved by hand in either directionwhen necessary.

By means of the lever P the gear-wheels O and G are brought into contactwith the gear on the center E, so that a change of contact from one tothe other reverses the motion of the feed-screw L, and a position midwaydisengages both gears, as shown in Fig. 2, when the feed-screw may berotated by means of the crank N.-

It is obvious that minor changes in detail of construction may be madewithout departing from the intent of my invention for a regularcontinuous spiral or serpentine feed with more or less pitch, asdesired, by employing a variety of wheels of different diameters andteeth.

IVhen desirable to increase or decrease the feed of the tool-head withrelation to the speed of the boring-bar, I use gear-wheels of differentsizes instead of those represented as I, J, and K. The boring bar andhead may be of any desired form or material in common use, which I donot claim as novel; but

hat I do claim as new and novel, and de sire to secure by Letters Patentof the United States, is

1. A reversible gear for boring-bars having a continuous spiral orserpentine feed, comprising in combination a bar provided with asuitable slidable tool-head and a suitablymounted screw to actuate saidhead, said screw having at or near one end a toothed wheel securedthereto, said wheel being situated near one end of said bar; alathe-center supporting revolubly one end of said bar and havinggear-teeth surrounding its periphery; a main frame having at one end aring or collar surrounding the end of said bar and adjustably anddetachably secured thereto adjacent to said toothed wheel, the oppositeend of said frame having a curved concentric slot; a revoluble shaftsuitably journaled in said frame, extending therethrough and havingsecured at one end adjacent to one side of said frame a toothed wheel; atoothed wheel revolubly supported on a stud and operatively connectingsaid toothed wheel and said toothed wheel of the feed-screw; anadjustable frame mounted at opposite side of said main frame by means ofsaid shaft revoluble therein, said adjustable frame having at one end anopening registering with said curved slot and a securing-bolttherethrough, and at its opposite end a pair of studs having arevolubletoothed wheel on each, so situated that either wheel may be engaged withthe gearteeth of said center or both disengaged by the swinging of saidadjustable frame; a toothed wheel secured to said shaft engaging one ofsaid wheels on said pair of studs; a lever attached to said adjustableframe, and means for manually rotating said shaft, substantially as andfor the purposes shown and de scribed.

2. In a boring-bar, a reversible continuous feed mechanism comprising incombination with a bar having a feed-screw and the wheel K, the center Eprovided with the teeth 6; the main frame C having at one end the ringor circular part 0 and means for adj ustably securing it to said bar,and having at the opposite end the slot M; the adjustable frame composedof the hub 11, and arms 11 and II mounted adjacent to said main frame,said arm II having the toothed wheels 0 and G revoluble on studs securedto said arm arranged so that either of said wheels may engage said teeth6 or be disengaged by means of swinging the arm II, and said arm Ilhaving an opening registering with said slot 7L2 and a binding-boltiherethrough; the shaft N passing through said frames revoluble insuitable openings therein; the toothed wheel Fsecured to said shaft andengagingwith the said wheel 0; the crank N secured to said shaftadjacent to said wheel F; the toothed wheel I secured to the oppositeend of said shaft; the toothed wheel J mounted on a suitable stud andengaging said wheel I and said wheel K, and the lever P attached to saidadj ustable frame, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

IVALTER S. PHELPS. lVit-nesses:

ROBERT W. JORDAN, JOHN LANGRIDGE.

